demo.py 文件源码

def draw(event, x, y, flags, param):
    global ix, iy, drawing

    if event == cv2.EVENT_LBUTTONDOWN:
        drawing = True
        ix, iy = x, y
    elif event == cv2.EVENT_MOUSEMOVE:
        if drawing:
            cv2.line(img, (ix, iy), (x, y), (0.9, 0.01, 0.9), pen_size)
            ix, iy = x, y
    elif event == cv2.EVENT_LBUTTONUP:
        drawing = False
        cv2.line(img, (ix, iy), (x, y), (0.9, 0.01, 0.9), pen_size)